ATTMT Item 130 - SECTION 07 27 10.00 10 BUILDING AIR BARRIER SYSTEM.pdf

NGBJV SC - FLIGHT SIMULATOR PSTE 189001

MCENTIRE JNGB, SC MARCH 26, 2021

SECTION 07 27 10.00 10

BUILDING AIR BARRIER SYSTEM

05/14

PART 1 GENERAL

1.1 SUMMARY

This Section specifies the construction and quality control of the installation of an air barrier system. Construct the air barrier system indicated, taking responsibility for the means, methods, and workmanship of the installation of the air barrier system. The air barrier must be contiguous and connected across all surfaces of the enclosed air barrier envelope indicated. The maximum leakage requirements of individual air barrier components and materials are specified in the other specification sections covering these items.

This section also defines the maximum allowable leakage of the final air barrier system. The workmanship must be adequate to meet the maximum allowable leakage requirements of this specification. Test the assembled air barrier system to demonstrate that the building envelope is properly sealed and insulated. Passing the air barrier system leakage test and thermography test will result in system acceptance. Conform air barrier system leakage and thermography testing and reporting to the requirements of Section 07 05 23 PRESSURE TESTING AN AIR BARRIER SYSTEM FOR AIR

TIGHTNESS.

1.2 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referenced within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM D4541 (2009; E 2010) Pull-Off Strength of Coatings Using Portable Adhesion Testers

1.3 DEFINITIONS

The following terms as they apply to this section:

1.3.1 Air Barrier Accessory

Products designated to maintain air tightness between air barrier materials, air barrier assemblies and air barrier components, to fasten them to the structure of the building, or both (e.g., sealants, tapes, backer rods, transition membranes, fasteners, strapping, primers).

1.3.2 Air Barrier Assembly

The combination of air barrier materials and air barrier accessories that are designated and designed within the environmental separator to act as a continuous barrier to the movement of air through the environmental separator.

SECTION 07 27 10.00 10 Page 1

Luckowski, James Text Box BIDDER INQUIRIES, Feburary 21, 2023

1.3.3 Air Barrier Component

Pre-manufactured elements such as windows, doors, dampers and service elements that are installed in the environmental separator.

1.3.4 Air Barrier Envelope

The combination of air barrier assemblies and air barrier components, connected by air barrier accessories that are designed to provide a continuous barrier to the movement of air through an environmental separator. There may be more than one air barrier envelope in a single building. Also known as Air Barrier System.

1.3.5 Air Barrier Material

A building material that is designed and constructed to provide the primary resistance to airflow through an air barrier assembly.

1.3.6 Air Barrier System

Same as AIR BARRIER ENVELOPE.

1.3.7 Air Leakage Rate

The rate of airflow (CFM) driven through a unit surface area (sq.ft.) of an assembly or system by a unit static pressure difference (Pa) across the assembly. (example: 0.25 CFM/sq.ft. @ 75 Pa)

1.3.8 Air Leakage

The total airflow (CFM) driven through the air barrier system by a unit static pressure difference (Pa) across the air barrier envelope. (example:

6500 CFM @ 75 Pa)

1.3.9 Air Permeance

The rate of airflow (CFM) through a unit area (sq.ft.) of a material driven by unit static pressure difference (Pa) across the material (example: 0.004 CFM/sq.ft. @ 75 Pa).

1.3.10 Environmental Separator

The parts of a building that separate the controlled interior environment from the uncontrolled exterior environment, or that separate spaces within a building that have dissimilar environments. Also known as the Control Layer.

1.4 PREPARATORY PHASE OR PRECONSTRUCTION CONFERENCE

Organize pre-construction conferences between the air barrier inspector and the sub-contractors involved in the construction of or penetration of the air barrier system to discuss where the work of each sub-contractor begins and ends, the sequence of installation, and each sub-contractor's responsibility to ensure airtight joints, junctures, penetrations and transitions between materials. Discuss the products, and assemblies of products specified in the different sections to be installed by the different sub-contractors.

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1.5 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for Contractor Quality Control approval. Submittals with an "S" are for inclusion in the Sustainability Notebook, in conformance to Section 01 33 29 SUSTAINABILITY REPORTING.

Submit the following in accordance with Section 01 33 00 SUBMITTAL

PROCEDURES:

SD-04 Samples

Mock-Up; G

Build one as specified prior to building construction.

SD-06 Test Reports

Design Review Report; G

Two copies not later than 14 days after approval of the Air Barrier Inspector Qualifications.

Testing and Inspection; G

SD-07 Certificates

Air Barrier Inspector; G

Two copies 30 days after Notice to Proceed.

1.6 AIR BARRIER ENVELOPE SURFACE AREA AND LEAKAGE REQUIREMENTS

The building air barrier systems must meet the following leakage requirements. The allowable leakage rate and the maximum leakage are at a differential test pressure of 75 Pa.

Air Barrier Envelope 1

Surface Area 5,741 square feet

Architectural Only Test:

Allowable leakage rate 0.40 CFM/sq.ft

Maximum leakage 2,296.4 total CFM

Architectural Plus HVAC System Test:

Allowable leakage rate 0.45 CFM/sq.ft

Maximum leakage 2,583.4 total CFM

Air Barrier Envelope 2

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28,957

11,582

13,030

Surface Area 8,324 square feet

Architectural Only Test:

Allowable leakage rate 0.40 CFM/sq.ft

Maximum leakage 3,329.6 total CFM

Architectural Plus HVAC System Test:

Allowable leakage rate 0.45 CFM/sq.ft

Maximum leakage 3,745.8 total CFM

Air Barrier Envelope 3

Surface Area 4,584 square feet

Architectural Only Test:

Allowable leakage rate 0.40 CFM/sq.ft

Maximum leakage 1,833.6 total CFM

Architectural Plus HVAC System Test:

Allowable leakage rate 0.45 CFM/sq.ft

Maximum leakage 2,062.8 total CFM

Air Barrier Envelope 4

Surface Area 1,648 square feet

Architectural Only Test:

Allowable leakage rate 0.40 CFM/sq.ft

Maximum leakage 659.2 total CFM

Architectural Plus HVAC System Test:

Allowable leakage rate 0.45 CFM/sq.ft

Maximum leakage 741.6 total CFM

Air Barrier Envelope 5

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6,770

2,708

3,046

Surface Area 2,992 square feet

Architectural Only Test:

Allowable leakage rate 0.40 CFM/sq.ft

Maximum leakage 1,196.8 total CFM

Architectural Plus HVAC System Test:

Allowable leakage rate 0.45 CFM/sq.ft

Maximum leakage 1,346.4 total CFM

Air Barrier Envelope 6

Surface Area 7,075 square feet

Architectural Only Test:

Allowable leakage rate 0.40 CFM/sq.ft

Maximum leakage 2,830.0 total CFM

Architectural Plus HVAC System Test:

Allowable leakage rate 0.45 CFM/sq.ft

Maximum leakage 3,183.7 total CFM

Air Barrier Envelope 7

Surface Area 19,814 square feet

Architectural Only Test:

Allowable leakage rate 0.40 CFM/sq.ft

Maximum leakage 7,925.6 total CFM

Architectural Plus HVAC System Test:

Allowable leakage rate 0.45 CFM/sq.ft

Maximum leakage 8,916.3 total CFM

Air Barrier Envelope 8

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Surface Area 29,286 square feet

Architectural Only Test:

Allowable leakage rate 0.40 CFM/sq.ft

Maximum leakage 11,714.4 total CFM

Architectural Plus HVAC System Test:

Allowable leakage rate 0.45 CFM/sq.ft

Maximum leakage 13,178.7 total CFM

Air Barrier Envelope 9

Surface Area 2,952 square feet

Architectural Only Test:

Allowable leakage rate 0.40 CFM/sq.ft

Maximum leakage 1,180.8 total CFM

Architectural Plus HVAC System Test:

Allowable leakage rate 0.45 CFM/sq.ft

Maximum leakage 1,328.4 total CFM

Air Barrier Envelope 10

Surface Area 37,073 square feet

Architectural Only Test:

Allowable leakage rate 0.40 CFM/sq.ft

Maximum leakage 14,829.2 total CFM

Architectural Plus HVAC System Test:

Allowable leakage rate 0.45 CFM/sq.ft

Maximum leakage 16,682.85 total CFM

1.7 AIR BARRIER INSPECTOR

Employ a designated Air Barrier Inspector on this project. The Air Barrier Inspector performs a Design Review, oversees quality control

SECTION 07 27 10.00 10 Page 6 testing specified in these specifications, performs quality control air barrier inspection as specified, interfaces with the designer and product manufacturer's representatives to assure all installation requirements are met, and coordinates efforts between all workers installing or penetrating the air barrier materials. Qualification for the Air Barrier Inspector are as follows:

a. Training and certification as an Air Barrier Installer from the Air Barrier Association of America (ABAA) or other third party air barrier association.

b. Experience coordinating and instructing personnel involved in the installation, joining, and sealing of air barrier materials and components.

1.8 DESIGN REVIEW

Review the Contract Plans and Specifications and advise the Contracting Officer of any deficiencies that would prevent the construction of an effective air barrier system. Provide a Design Review Report individually listing each deficiency and the corresponding proposed corrective action necessary for proper air barrier system.

PART 2 PRODUCTS

Not Used

PART 3 EXECUTION

3.1 QUALITY CONTROL

3.1.1 Documentation and Reporting

Document the entire installation process on daily job site reports. These reports include information on the Installer, substrates, substrate preparation, products used, ambient and substrate temperature, the location of the air barrier installation, the results of the quality control procedures, and testing results.

3.1.2 Construction Mock-Up

a. Prepare a construction mock-up to demonstrate proper installation of the air barrier assemblies and components. Include air barrier system connections between floor and wall, wall and window, wall and roof.

Also, include the sealing method between membrane joints at transitions from one material or component to another, at pipe or conduit penetrations of the wall and roof, and at duct penetration of the wall and roof. Work will not begin until the mock-up is satisfactory to the Contracting Officer.

b. Size the mock-up to approximately 8 feet long by 8 feet high. The mock-up must be representative of primary exterior wall assemblies and glazing components including backup wall and typical penetrations as acceptable to the Contracting Officer. A corner of the actual building may be used as the mock-up.

c. Mock-Up Tests for Adhesion: Test the mock-up of materials for adhesion in accordance with manufacturer's recommendations. Perform the test after the curing period recommended by the manufacturer.

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Record the mode of failure and the area which failed in accordance with ASTM D4541. When the air barrier material manufacturer has established a minimum adhesion level for the product on the particular substrate, the inspection report must indicate whether this requirement has been met. Where the manufacturer has not declared a minimum adhesion value for their product/substrate combination, simply record the value.

3.1.3 Quality Control Testing And Inspection

Conduct the following tests and inspections as applicable in the presence of the Contracting Officer during installation of the air barrier system, and submit quality control reports as indicated below.

a. Provide a Daily Report of Observations with a copy to the Contracting Officer.

b. Inspect to assure continuity of the air barrier system throughout the building enclosure and that all gaps are covered, the covering is structurally sound, and all penetrations are sealed allowing for no infiltration or exfiltration through the air barrier system.

c. Inspect to assure structural support of the air barrier system to withstand design air pressures.

d. Inspect to assure masonry surfaces receiving air barrier materials are smooth, clean, and free of cavities, protrusions and mortar droppings, with mortar joints struck flush or as required by the manufacturer of the air barrier material.

e. Inspect and test to assure site conditions for application temperature, and dryness of substrates are within guidelines.

f. Inspect to assure substrate surfaces are properly primed if applicable and in accordance with manufacturer's instructions. Priming must extend at least 2 inches beyond the air barrier material to make it obvious that the primer was applied to the substrate before the air barrier material.

g. Inspect to assure laps in materials are at least a 2-inch minimum, shingled in the correct direction or mastic applied in accordance with manufacturer's recommendations, and with no fishmouths.

h. Inspect to assure that a roller has been used to enhance adhesion.

Identify any defects such as fishmouths, wrinkles, areas of lost adhesion, and improper curing. Note the intended remedy for the deficiencies.

i. Measure application thickness of liquid applied materials to assure that manufacturer's specifications for the specific substrate are met.

j. Inspect to assure that the correct materials are installed for compatibility.

k. Inspect to assure proper transitions for change in direction and structural support at gaps.

l. Inspect to assure proper connection between assemblies (membrane and sealants) for cleaning, preparation and priming of surfaces, SECTION 07 27 10.00 10 Page 8 structural support, integrity and continuity of seal.

m. Perform adhesion tests for fluid-applied and self-adhered air barrier membranes to assure that the manufacturer's specified adhesion strength properties are met. Determine the bond strength of coatings to substrate in accordance with ASTM D4541.

n. Provide cohesion tests for spray polyurethane foam (SPF). Perform the tests in accordance with the specification sections which specify these materials.

o. Provide written test reports of all tests performed.

3.2 REPAIR AND PROTECTION

Upon completion of inspection, testing, sample removal and similar services, repair damaged construction and restore substrates, coatings and finishes. Protect construction exposed by or for quality control service activities, and protect repaired construction.

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